As a general rule mosaic tiles up to 2 inches wide benefit the most from trowels with notches that are 1 8 to 1 4 inch in size.
3 8 u notch best for mosiac floors.
For example a 1 4 x 3 8 x 1 4 inch trowel has 1 4 inch wide 1 4 inch deep teeth spaced every 3 8 inches.
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Anything bigger than what s listed.
The second is the spacing between teeth.
The most common type of trowel for floors is the u notched trowel.
3 4 x 9 16 u notch.
Mosaic installations up to 2 inches can use a 1 8 inch notch as.
This can either be a literal u shaped notch or it all tile manufacturers offer a recommended trowel size.
What size notch trowel for a 12 12 porcelain tile floor.
To install 12 x 12 and larger tiles with a medium bed mortar the ntca recommends a u notch trowel between 3 8 x 3 4 x 9 16 and 25 64 x 3 4 x 19 32.
The larger the tile the larger the trowel.
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Those are general guidelines and will work with most installations.
Mosaic installations up to 2 inches can use a 1 8 inch notch as can wall tiles of up to 4 inches as a general rule.
1 4 x 3 8 square notch.
It s rare that i use this trowel size.
1 what size notch trowel for a 12 12 porcelain tile floor.
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Square notch trowels often have three numbers indicating the size and spacing of the notches.
Four inch up to 8 inch tiles need a 1 4 to 3 16 inch notch trowel.
Smaller than 1 8 notch.
A trowel size smaller than a 1 8 square notch trowel is usually for glues.
16 inch tiles need a 1 2 inch deep notch and anything over 24 inches should use a this thin set mortar is applied onto the wall or floor surface with a notched trowel according to tile type and size.
The first number is the width of each tooth.
While i occasionally use glues with some.
Use this for 8 8 s and some of the 5 16 thick 12 12 builder grade tile.
The third is the depth of the teeth.
This may also be a good trowel size for thicker 5 16 mosaics.
How to choose.